Numerical and experimental studies of the mechanism of the wavy interface formations in explosive/impact welding

Mousavi, A. A. Akbari; Al-Hassani, S.T.S.

doi:10.1016/j.jmps.2005.06.001

Cited by 223 publications

(88 citation statements)

References 25 publications

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“…A similar tendency in wave parameters (various wavelengths) was reported by Mousavi et al in explosively welded stainless steel with steel. [40] The authors explain this morphology by the change of impact angle. It should be noted that our upper interface was of good quality without any pores.…”

Section: A Microstructurementioning

confidence: 99%

Microstructural and Phase Composition Differences Across the Interfaces in Al/Ti/Al Explosively Welded Clads

Fronczek

Chulist

Lityńska‐Dobrzyńska

et al. 2017

Metall Mater Trans A

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The microstructure and phase composition of Al/Ti/Al interfaces with respect to their localization were investigated. An aluminum-flyer plate exhibited finer grains located close to the upper interface than those present within the aluminum-base plate. The same tendency, but with a higher number of twins, was observed for titanium. Good quality bonding with a wavy shape and four intermetallic phases, namely, TiAl 3 , TiAl, TiAl 2 , and Ti 3 Al, was only obtained at the interface closer to the explosive material. The other interface was planar with three intermetallic compounds, excluding the metastable TiAl 2 phase. As a result of a 100-hour annealing at 903 K (630°C), an Al/TiAl 3 /Ti/TiAl 3 /Al sandwich was manufactured, formed with single crystalline Al layers. A substantial difference between the intermetallic layer thicknesses was measured, with 235.3 and 167.4 lm obtained for the layers corresponding to the upper and lower interfaces, respectively. An examination by transmission electron microscopy of a thin foil taken from the interface area after a 1-hour annealing at 825 K (552°C) showed a mixture of randomly located TiAl 3 grains within the aluminum. Finally, the hardness results were correlated with the microstructural changes across the samples.

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Section: A Microstructurementioning

confidence: 99%

Microstructural and Phase Composition Differences Across the Interfaces in Al/Ti/Al Explosively Welded Clads

Fronczek

Chulist

Lityńska‐Dobrzyńska

et al. 2017

Metall Mater Trans A

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“…A jet is expected to be generated, which will remove the oxidized surface layer and produce two fresh surfaces by the oblique impact. Then solid state bonding can be obtained under the great impact pressure and plastic shear deformation in the interface [22][23][24][25]. The whole process is completed in microseconds [14].…”

Section: Mechanism Of Laser Impact Spot Weldingmentioning

confidence: 99%

Investigation on a Novel Laser Impact Spot Welding

Liu

Gao

Zhang

et al. 2016

Metals

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Abstract:In this paper a novel laser impact spot welding (LISW) method is described, in which a hump was formed on the flyer plate on the intended welding spot location by local pre-forming. When the flyer and base plates were placed together to perform welding, the two plates kept in contact over their entire surfaces except at the hump, where a local air gap was enough to guarantee the impact velocity and collision angle to achieve spot welding using laser pulse energy. The presented approach was implemented to join thin titanium foils to copper foils under low laser energy system. Joints with regular shapes were obtained. The microstructure in the weld interface was studied with scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It was found that the jetting occurred at the central region of the weld spots due to oblique impact. Wave features were observed in the weld interfaces. The impact energy was found to have significant influence on the wave's characteristics. Moreover, SEM images and EDS analysis did not show apparent element diffusion across the weld interface. Besides, the lap shearing test was used to characterize the mechanical properties of the spot welded joints.

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“…Mousavi et al [8,9] studied the impact process using Euler method. The materials at the collision point were considered to behave like a liquid, the straight or wavy interfaces and jetting phenomena were modeled, and the magnitude of the waves and velocity of jet were predicted.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of explosive welding using Smoothed Particle Hydrodynamics method

Feng

Chen

Zhou

et al. 2017

IJM

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Numerical and experimental studies of the mechanism of the wavy interface formations in explosive/impact welding

Cited by 223 publications

References 25 publications

Microstructural and Phase Composition Differences Across the Interfaces in Al/Ti/Al Explosively Welded Clads

Microstructural and Phase Composition Differences Across the Interfaces in Al/Ti/Al Explosively Welded Clads

Investigation on a Novel Laser Impact Spot Welding

Numerical simulation of explosive welding using Smoothed Particle Hydrodynamics method

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